91644631470000 has 800 divisors, whose sum is σ = 382759779663360. Its totient is φ = 20552088960000.

The previous prime is 91644631469999. The next prime is 91644631470001. The reversal of 91644631470000 is 7413644619.

91644631470000 is a `hidden beast` number, since 9 + 1 + 6 + 4 + 4 + 631 + 4 + 7 + 0 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (91644631469999) and next prime (91644631470001).

It is a super-4 number, since 4×91644631470000⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (91644631470001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 99712555 + ... + 100627445.

Almost surely, 2^{91644631470000} is an apocalyptic number.

91644631470000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91644631470000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191379889831680).

91644631470000 is an abundant number, since it is smaller than the sum of its proper divisors (291115148193360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91644631470000 is a wasteful number, since it uses less digits than its factorization.

91644631470000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914988 (or 914961 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 91644631470000 in words is "ninety-one trillion, six hundred forty-four billion, six hundred thirty-one million, four hundred seventy thousand".